root@armadillo:~/keibi/keibi# sudo apt-get -y upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  libldap-2.4-2 libldap-common libzstd1
3 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 497 kB of archives.
After this operation, 6144 B of additional disk space will be used.
Err:1 http://security.debian.org buster/updates/main armhf libzstd1 armhf 1.3.8+dfsg-3+deb10u1
  404  Not Found [IP: 151.101.110.132 80]
Err:2 http://security.debian.org buster/updates/main armhf libldap-common all 2.4.47+dfsg-3+deb10u5
  404  Not Found [IP: 151.101.110.132 80]
Err:3 http://security.debian.org buster/updates/main armhf libldap-2.4-2 armhf 2.4.47+dfsg-3+deb10u5
  404  Not Found [IP: 151.101.110.132 80]
E: Failed to fetch http://security.debian.org/pool/updates/main/libz/libzstd/libzstd1_1.3.8+dfsg-3+deb10u1_armhf.deb  404  Not Found [IP: 15]
E: Failed to fetch http://security.debian.org/pool/updates/main/o/openldap/libldap-common_2.4.47+dfsg-3+deb10u5_all.deb  404  Not Found [IP:]
E: Failed to fetch http://security.debian.org/pool/updates/main/o/openldap/libldap-2.4-2_2.4.47+dfsg-3+deb10u5_armhf.deb  404  Not Found [IP]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
root@armadillo:~/keibi/keibi#